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Data entry apparatus and method

  • US 6,600,481 B1
  • Filed: 06/10/1996
  • Issued: 07/29/2003
  • Est. Priority Date: 06/10/1996
  • Status: Expired due to Term
First Claim
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1. A wireless messaging unit for composing alphanumeric messages comprising:

  • (a) a data entry device having a left tab, a right tab, an up tab and a down tab, and an enter function; and

    (b) a display containing individual alphanumeric characters and data manipulation tokens for selection using said data entry device.

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